01 -
Mix masa with water in a blender till smooth and lump-free.
02 -
Warm the milk with cinnamon just till it starts to steam.
03 -
Pour the masa mixture through a strainer into the pot of milk.
04 -
Drop the heat, then put in chocolate, vanilla, and sugar. Stir steadily till it's melted.
05 -
Keep whisking as it cooks until it thickens and starts to bubble.
06 -
If you'd like it super smooth, run it through a strainer before pouring into cups.